October weather forecast
Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha

October brings a noticeable decline in rainfall, which falls to 151mm (5.94"), as the weather starts to dry up. This coincides with a steady increase in temperatures, setting the stage for the approaching summer months. The sea temperature, daylight hours, and sunshine hours also increment slowly, signalling towards brighter and sunnier days. As such, October serves as a reminder of the imminent tropical climate, characterized by moderate migration of elemental parameters.

Temperature

Tristan da Cunha experiences a subtle adjustment in high-temperatures to a still refreshing 15°C (59°F) with the onset of October, maintaining near parity with September's 14°C (57.2°F). Tristan da Cunha's October nights exhibit a subtle drop in temperature, averaging at a fresh 11°C (51.8°F), closely aligned with the daytime highs.

Rainfall

In Tristan da Cunha, in October, during 22 rainfall days, 151mm (5.94") of precipitation is typically accumulated. In Tristan da Cunha, during the entire year, the rain falls for 251 days and collects up to 1681mm (66.18") of precipitation.

Sea temperature

In Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha, the average seawater temperature in October is 14°C (57.2°F).
Note: Swimming in 14°C (57.2°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience.

Daylight

The average length of the day in October in Tristan da Cunha is 13h and 4min.
On the first day of October in Tristan da Cunha, sunrise is at 06:23 and sunset at 18:53. On the last day of the month, sunrise is at 05:43 and sunset at 19:21 GMT.

Sunshine

In Tristan da Cunha, the average sunshine in October is 4.3h.

UV index

The average daily maximum UV index in October is 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In October, the maximum UV index of 7 transforms into these recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.